Usage of deprecated and unsafe methods

Version

• react-bootstrap-typeahead: 3.3.2
• react, react-dom: 16.7.0

Steps to reproduce

Wrap the app in <React.StrictMode> and start it in development mode.

Repro: https://github.com/thetric/react-bootstrap-typeahead-legacy-api-repro

Expected Behavior

This library should be warning-free in React.StrictMode

Actual Behavior

React logs warnings of legacy API usage:

Deprecated findDOMNode

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of InputContainer(Component) which is inside StrictMode. Instead, add a ref directly to the element you want to reference.

    in div (created by HintContainer(TypeaheadInputSingle))
    in HintContainer(TypeaheadInputSingle) (created by Context.Consumer)
    in Unknown (created by InputContainer(Component))
    in InputContainer(Component) (created by Typeahead)
    in div (created by Typeahead)
    in Typeahead (created by WrappedTypeahead)
    in WrappedTypeahead (created by TypeaheadContainer(WrappedTypeahead))
    in RootCloseWrapper (created by TypeaheadContainer(WrappedTypeahead))
    in TypeaheadContainer(WrappedTypeahead) (at App.js:13)
    in App (at src/index.js:9)
    in StrictMode (at src/index.js:9)

Learn more about using refs safely here:
https://fb.me/react-strict-mode-find-node

Unsafe lifecycle methods Fixed

Fixed in v4.0.0-alpha.1 pre-release. (see comment below).

Warning: Unsafe lifecycle methods were found within a strict-mode tree:
    in StrictMode (at src/index.js:9)

componentWillReceiveProps: Please update the following components to use static getDerivedStateFromProps instead: TypeaheadContainer(WrappedTypeahead)

Learn more about this warning here:
https://fb.me/react-strict-mode-warnings

Note from Update on Async Rendering:

Both the older componentWillReceiveProps and the new getDerivedStateFromProps methods add significant complexity to components. This often leads to bugs. Consider simpler alternatives to derived state to make components predictable and maintainable.

Also see You Probably Don’t Need Derived State.

In React 17 componentWillReceiveProps will be removed. (Only UNSAFE_XXX will remain.)

[MWallenberg]

This seems like a required, but breaking, change. Might I propose a new major-version of react-bootstrap-typeahead, with dropped support for react < 16.8 but this issue fixed?

[ericgio]

componentWillReceiveProps removed in v4.0.0-alpha.1 pre-release.